Challenged by an ever-increasing competition of purely internet-based providers of communication services, incumbent NGN service providers are constantly looking for new means that are allowing for lowering capital expenditures and operational costs. To this end the majority of telecommunication operators have lately adopted all-IP based Next Generation Network (NGN) platforms for network infrastructure consolidation and for convergence of fixed, mobile, cable and satellite networks. For cost-efficiently providing NGN services, service oriented architecture (SOA) based service delivery mechanisms are continuously being utilized, allowing for increased service re-usability and lower service integration and management overheads. Elastic cloud computing mechanisms as well as attractive pay-per-use cost models of public cloud providers already have attracted a broad range of web service providers. For providers of real-time, conversational, highly reliable NGN services however, the lack of mechanisms for cost-efficient and quality-assured service delivery still represents a significant obstacle for utilization of public clouds. This work proposes a system which tries to overcome these obstacles, exploiting the cloud provider market through cloud federation mechanisms, efficient cloud resource allocation mechanisms as well as on End-to-End QoS monitoring and assurance mechanisms. To this end, the approach exploits SOA principles, policy-based management, and autonomic computing mechanisms. Taking the viewpoint of NGN service providers, this work analyses the requirements and critical factors for resource efficient, service quality management of NGN services that are deployed on multiple federated cloud infrastructures. Proposed mechanisms are validated and evaluated in isolated testbeds as well as large-scale multi-cloud facilities, operating standard-based NGN platforms and delivering real NGN services under realistic NGN workloads. The performance evaluations provide insights into applicability, effectiveness and efficiency of the proposed approach. The author, a senior scientist with Fraunhofer’s Institute for Open Communication Systems (FOKUS) in Berlin, leading the Future Internet team at the department for Next Generation Network Infrastructures (NGNI) conducted, this work in the context of several industry, national and European research projects, supervising several diploma and master theses. Results were published in multiple research papers, books and journals, and frequently presented at international tutorials. Aspects of the developed system were used for contributions to the IEEE cloud federation standardization, integrated into industry solutions, testbed infrastructures and used as a basis for further, currently ongoing research projects.
|School:||Technische Universitaet Berlin (Germany)|
|Source:||DAI-C 81/1(E), Dissertation Abstracts International|
|Keywords:||Next generation networks|
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